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gpio: Export gpiod_get_from_of_node()

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This function already exist inside gpiolib, we were just
reluctant to make it available to the kernel at large as
the devm_* seemed to be enough for anyone.

However we found out that regulators need to do their own
lifecycle/refcounting on GPIO descriptors and explicitly
call gpiod_put() when done with a descriptor, so export
this function so we can hand the refcounting over to the
regulator core for these descriptors after retrieveal.

Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Marek Szyprowski <[email protected]>
Tested-by: Marek Szyprowski <[email protected]>
Reviewed-by: Charles Keepax <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Linus Walleij 2018-12-06 13:43:42 +01:00 • committed by Mark Brown
commit fe6c473e3e
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2 changed files with 13 additions and 6 deletions
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6
drivers/gpio/gpiolib.h
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@ -201,12 +201,6 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep,
struct gpio_array *array_info,
unsigned long *value_bitmap);
/* This is just passed between gpiolib and devres */
struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
const char *propname, int index,
enum gpiod_flags dflags,
const char *label);
extern struct spinlock gpio_lock;
extern struct list_head gpio_devices;